17. Simplify the expression: \(2s \cdot \frac{5}{3}t\)

To simplify the expression \(2s \cdot \frac{5}{3}t\), we multiply the numerical coefficients and the variables separately.

Multiply the coefficients: \(2 \cdot \frac{5}{3} = \frac{10}{3}\).

Multiply the variables: \(s \cdot t = st\).

Combine the results: \(\frac{10}{3}st\).

Ответ: \(\frac{10}{3}st\)